C# LINQ List<T>.ForEach迭代器扩展方法

 public static partial class IEnumerableExtensions
 {
     /// <summary>
     /// 迭代器
     /// </summary>
     /// <typeparam name="T"></typeparam>
     /// <param name="list">实体列表</param>
     /// <param name="func">处理函数</param>
     public static void ForEach<T>(this IEnumerable<T> list, Action<T> func)
     {
         foreach (var item in list)
         {
             func(item);
         }
     }

 }

//关联更新数据
(from a in listResult
 join b in listApprovalList on a.NodeId equals b.NodeId
 select new { a, b }).ForEach(item =>
 {
     item.a.ApprovalComments = item.b.ApprovalComments;
     item.a.ApprovalTime = item.b.ApprovalTime;
     item.a.ApprovalStatus = item.b.ApprovalStatus;
     item.a.ApprovalUserId = item.b.ApprovalUserId;

 });